Method for forming composite cords and braids



Aug. 22, 1933. w. MENDEL METHOD OF FORMING COMPOSITE CORDS AND 'BRAIDS Filed Dec. 20, 1950 14441.04 M/Yoa,

(Ittorneg Patented Aug. 22, 1933 PATENT OFFICE METHOD FOR FORMING COMPOSITE CORDS AND BRAIDS William Mendel, Beverly, J.

Application December 20, '1930 Serial No. 503,756

7 Claims.

My invention may be advantageously employed to make filamentous materials which may be utilized in "the production of ornamental textile fabrics, for, instance, for the manufacture of hat crowns and trimmings.

The object and eifect of my invention is to produce strings, threads, stranded cords, braids, etc.,' having the capacity for being brilliantly dyed which is characteristic of artificial textile filaments formed of cellulose acetate or cellulose nitrate, or similar cellulosic compounds, but with greater strength than is ordinarily characteristic of those filaments in a loose state; such greater strength being attained by associating with such artificial filaments, which are soluble, other artificial filaments which are not soluble in a solvent of such acetate or nitrate, and then subjecting the aggregate of soluble and insoluble filaments to the action of a solvent which causes the soluble filaments to coalesce upon and adhere to the insoluble filaments. The soluble and insoluble elements of the composite structure may be twisted together or one wrapped upon or braided 'on the other, before being subjected to by projecting a compound of cellulose (variously known as cellulose sulphocarbonate or cellulose thiocarbonate) through minute spinneret orifices.

into any medium which will coagulate the cellulose as a semi-solid impure cellulose hydrate.

copper oxide by what is known as the cuprammonium process or from a solution of cellulose If the soluble elements of such composite structuresare'formed of cellulose acetate, the

structures may be subjected to the action of ethyl acetate, or a mixture of alcohol and ether,,bothv of which are suitable solvents for cellulose acetate. If the soluble material of the composite structure is a product of cellulose nitrate,acetone 'may be employed as the solvent. In any case;

the effect of the solvent is to partly dissolve the tures of procedure and product hereinafter more definitely specified.

In said drawing; Fig. I is a fragmentary enthe action of the solvent, and the effect of the latter may be enhanced by compressing the.composite' product, either before or after it is dried.

larged respective View of acord wherein a single filament of covering material is twisted with a single filament of core material.

Fig. II is across sectional view of thestructure shown in Fig. I.

Fig. III shows a fragment of the structure of Fig. I after the covering material has been subjected to the action of a solvent thereof.

Fig. IV. is a cross sectional view, similar to Fig. II, but showing the structure of Fig. III with the core material integrated with the covering material by the softening and deforming effect of the solvent of the latter.

' Fig. V is a cross sectional view of the structure shown in Fig. IV, but compressed and dried to 7 form asubstantially flat band or ribbon, wherein the core and covering materials alternate from edge to edge'throughout its length.

Fig. VI is'a fragmentary enlarged perspective view of a cord wherein a pluralityof substantially straight core'filaments are wrapped with a single filament of covering material.

Fig. VII is a cross sectional view of the struc ture shown in Fig. VI.

Fig. VIII shows a' fragment of the structure of Fig. VI after the covering material has been subjected to the action of a; solvent. I

Fig. IX is across sectionalview similar .to FigJVII but showing the structure of Fig.'VI with the core material integrated with the covering material by the softening and deforming effect of the solvent of the latter.

Fig. X is across, sectional view of the structure shown in Fig.;IX but compressed'and dried to form a substantially fiat band or ribbon, wherein the core material'is entirely sheathed by the covering material. Q

Fig. XIis'a fragmentary enlarged perspective View of a braid wherein a plurality of core filaments are interlaced witha plurality of covering filaments.

Fig. ,XII is a cross sectional view of the struc-' ture shown in Fig. XI. Fig. XIII shows a fragment of the structure 160 of Fig. XI after the covering'material has been] subjected'to the action of a solvent. Fig. XIVis a cross sectional View similar to Fig. XII but showing the structure of Fig. XI with the core material integrated with the covering material by the softening and deforming" effect of the solvent of the latter.

Fig. XV is a plan view of the structure of Fig. XIV compressed and dried to form a substantially fiat band or ribbon wherein, thecore nc-- 1 .Fig. II.

mersed in or drawn through a liquid solvent of,

terial is visible at intervals throughout the length of the fabric.

Fig. XVI is a cross sectional view of the braid shown in Fig. XV.

Referring to the form of my invention shown in Figs. I to V inclusive; the core 1 consists of a filament or filaments, of the insoluble character above contemplated, having the desired tensile strength. Ihe covering material 2v is anartificial filament or filaments formed of a coagulated cellulosic compound such as cellulose acetate or cellulose nitrate. Said materials 1 and 2 twisted together as indicated in Fig. I. formza compositecord 3, but the two materials are primarily separate and distinct, as indicated in Said composite product 3jis thenimthe artificial cellulosic material 2 but which has no solvent effect upon the insoluble material 1; In.any case; the .eifect of the solvent is to cause the cellulosic material .2 to coalesceupon'and conveniently by running said cord 3 between parallel rollers. In such flattened form the core 1 and covering material 2 alternate from edge toedge thereof through the length of the product 5. I H

In the form of rality of insoluble filaments such as above contemplated which, while in substantially straight parallel relation, are wrapped with a covering filament or. filaments 8 of the cellulosic material aforesaid, to form the cord product 9. As indicatedin Fig. VII, said core 7 and covering 8 are primarily separate and distinct.

covering material 8,'the latter is caused to coalesce upon'the'core material 7 and. adhere there'- toso as to form a substantially continuous sheath for tliecore material, as indicated in Figs. VIII and.IX. As'indicatedin Figs. VII and VIII; the

composite cord 9 is substantiallyv round. However, either before or after it is dried, it may be compressed to form a substantially flat band or ribbon as indicated at 10in Fig. X..

Referring to the form of my invention shown.

in Figs. XI to XV inclusive, the core 12 is a plu- 'rality of insoluble filaments such as above contemplated, which may be arranged in parallelv relation in a substantially common plane, as indicated in Fig. XII with covering filaments 13 of soluble material; as aforesaid, interlaced therer with by the operation of a suitable braiding 'mechanism to form the substantially fiat braid 14, in which the core material 12 and covering material 13 are separate and. distinct, as indicated in Figs. XI and. XII. However, by subjecting said braid 14' to the action of a suitable sol- I -vent' of. the material 13, as above contemplated,

said material 13 is caused to coalesce upon and adhere tothe core material 12, as indicated in Figs. XIII and XIV.

The composite braid product shown in Figs.

XIII and XIV may be compressed either before or after it is dried, to a flatter band or ribbon 15, as indicated in Figs. XV and XVI. wherein my invention shownin Figs. VI to X inclusive, the core '7 is formed of a plu- However, by subjecting them to the action of a solvent of the the core material 12 is visible at intervals throughout its length.

As above noted; all of the composite products above described are capable of being more brilliantly colored, by ordinary dyes, then natural textile fibers, and may be made like ordinary thread or yarn suitable for being woven, knit, or otherwise utilized in textile fabrics; However,'the products above described may be used singly in the formation of any suitable fabric. For instance, the braid shown in Figs. XV and XVI- has asheenexceeding that of the most lustrous natural straw and may be formed of such width that successive convolutions thereof may be sewed together to form a hat crown.

It is-to'beunderstood that the forms of my invention above described are merely typical, and that various modifications may be'made therein without departing from the essential features of my invention, as defined in the appended claims.

I claimi l 1. The method ofv forming a stringlike: structure, entirely of artificial filaments, which consists in assembling filaments of materialrespectively soluble and insoluble in the samefsolvent, in a dry state, and thereafter subjectingthe structure to the action of aisolvent ofv the soluble filament material until it, coalesces and'adheres to the insoluble filament material, and compressing said structure.

2. The method of forming a stringlike structure, entirely of artificial filaments, whichconsistsin assembling filaments of material'frespectively soluble, and insoluble in the same solvent,

in a dry state, and thereafter subjecting the structure to the action of a solvent ofthe soluble filament material until it coalesces andadheres to the insoluble filament material, and compressingsaid structure until the materials thereof. are

integrated, while the soluble material is softened.

with the solvent. 3..The method of forming a stringlike structure, entirely of artificial filaments, whichic'onsists in assemblinglfilaments of material resp'ectively soluble and insoluble inthe same solvent, in a dry state, and thereafter subjecting the structure to the action of a solvent of the soluble filament material untilit coalescesand adheres to the insoluble filament material, a'ndcompressing said structure until his substantially fiat.

l. The method of forming. a stringlike structure, entirely of artificial filaments, which consists inassembling filaments of material respectively soluble and insoluble in the same solvent, in a. dry state, and thereafter subjecting the structure to .the actionofa solvent of the soluble filament materialuntil it coalesces and adheres tothe insoluble filament, material uponthe exterior thereof, covering, and, concealing said in-.

soluble material,. and compressing said. soluble material upon said insoluble material.

5. The methodof forming a.- stringlike structure, entirely of artificial filaments, which consists in assembling filaments of materialrespew.

6,. Themethod of forming, astringlike structure, entirely of artificial filaments, which con- & isc

sists in assembling filaments of material respectively soluble and insoluble in the same solvent, in interlaced relation, in a dry state, and thereafter subjecting the structure to the action of a solvent of the soluble filament material until it coalesces and adheres to the insoluble filament material, and compressing said structure until it is substantially flat. 7

WILLIAM MENDEL. 

